package com.fwx.springcloud.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.concurrent.TimeUnit;

/**
 * @author : fengwenxiang
 * @date : 2022/6/26 16:10
 * @description：模拟业务类
 */
@Service
public class PaymentService {
    public String paymentInfo_OK(Integer id)
    {
        return "线程池:  "+Thread.currentThread().getName()+"  paymentInfo_OK,id:  "+id+"\t"+"O(∩_∩)O哈哈~";
    }

    @HystrixCommand(fallbackMethod = "paymentInfo_TimeOut_handler"/**这里是指定兜底方法**/, commandProperties = {
            @HystrixProperty(name="execution.isolation.thread.timeoutInMilliseconds",value = "4000")//配置超时时间是3秒，3秒后执行兜底方法
    })
    public String paymentInfo_TimeOut(Integer id)
    {
//        int a = 10/0;
        try { TimeUnit.MILLISECONDS.sleep(3000); } catch (InterruptedException e) { e.printStackTrace(); }
        return "线程池:  "+Thread.currentThread().getName()+" id:  "+id+"\t"+"O(∩_∩)O哈哈~"+"  耗时(秒): 3";
    }
    public String paymentInfo_TimeOut_handler(Integer id){
        return "线程池：  "+ Thread.currentThread().getName()+"   paymentInfo_TimeoutHandler,  id:  "+id
                +"\t"+"o(╥﹏╥)o";
    }

    /*****服务熔断****/
    @HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback",commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled",value = "true"),
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds",value = "30000"),//窗口期,短路多久以后开始尝试是否恢复,默认5秒
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold",value = "10"),//请求容量门槛,窗口期内触发断路器的请求阈值,达不到不会触发断路器
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage",value = "20")//错误率，默认容忍错误率为50%
    })
    public String paymentCircuitBreaker(@PathVariable("id") Integer id){
        if(id < 0){
            throw new RuntimeException("****** id 不能为负数");
        }
        String s = IdUtil.simpleUUID();
        return Thread.currentThread().getName()+"\t"+"调用成功，流水号: " + s;
    }
    public String paymentCircuitBreaker_fallback(@PathVariable("id") Integer id) {
        return "id 不能负数，请稍后再试，/(ㄒoㄒ)/~~   id: " +id;
    }
}
